[Solved] Slow down Car on "Simple Car Following Path" Gamelet

[Jan-Bart]

Hi all!

I'm a newbie, so maybe this is a rather silly question, but as I was playing with the "Simple Car Following Path" gamelet on https://babylonjsguide.github.io/gamelets/Car_Path

I was wondering if it's possible to speed up (or slow down) the car without changing the framerate. (eg everything would slow down/speed up)
If it's possible, how should I do it? Or is this not the best way to animate a car on a path?

Thanks in advance!

[Sebavan]

@JohnK will be pretty happy to help knowing you are reading his great tutorials serie ?

[JohnK]

Hi @Jan-Bart and welcome to the forum from me. Tweaked the PG a bit. Slowed down the car by increasing the number of points along the curve (line 84) this will determine the minimum possible speed. So if you want to stop the car you would need to stop the animation. You can then increase the speed of the car by, in the animation, jumping to points further ahead (use of var speed) You could control the value of speed if you want to with key presses. Note speed has minimum value of 1 and must be an integer. More accurately k must be an integer so you could use k = Math.round(i + speed).

http://www.babylonjs-playground.com/#1YD970#45

Hope this gives you somewhere to go. 

[Jan-Bart]

Hi @JohnK , thanks for answering my question and your tutorial serie, it's really helping me getting to know Babylon.
By PG you're referencing to the Playground I suppose? (yeah, newbie...) and more specificly this one? http://www.babylonjs-playground.com/indexStable.html#1YD970#14

Also; is it correct that if you stop the animation all other moving things (eg other cars) would stop at the same time?

I get what you mean by skipping points further ahead and will try this asap

[JohnK]

@Jan-Bart apologies forgot to post tweaked PG http://www.babylonjs-playground.com/#1YD970#45

[JohnK]

49 minutes ago, Jan-Bart said:

Also; is it correct that if you stop the animation all other moving things (eg other cars) would stop at the same time?

No. Within scene.registerAfterRender loop use an 'if' statement to move car if not stopped and keep any other animations running

scene.registerAfterRender(function()) {
    if(car not stopped) {
       move car
    }
    do other animations
}

 

[Jan-Bart]

That's exactly what I was looking for. Thanks @JohnK!